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<h1 id="get-started">Get Started</h1>
<p>Compile and run {fmt} examples online with <a href="https://godbolt.org/z/P7h6cd6o3">Compiler Explorer</a>.</p>
<p>{fmt} is compatible with any build system. The next section describes its usage
with CMake, while the <a href="#build-systems">Build Systems</a> section covers the rest.</p>
<h2 id="cmake">CMake</h2>
<p>{fmt} provides two CMake targets: <code>fmt::fmt</code> for the compiled library and
<code>fmt::fmt-header-only</code> for the header-only library. It is recommended to use
the compiled library for improved build times.</p>
<p>There are three primary ways to use {fmt} with CMake:</p>
<ul>
<li>
<p><strong>FetchContent</strong>: Starting from CMake 3.11, you can use <a href="https://cmake.org/cmake/help/v3.30/module/FetchContent.html"><code>FetchContent</code></a> to automatically
  download {fmt} as a dependency at configure time:</p>
<pre class="highlight"><code>include(FetchContent)

FetchContent_Declare(
  fmt
  GIT_REPOSITORY https://github.com/fmtlib/fmt
  GIT_TAG        e69e5f977d458f2650bb346dadf2ad30c5320281) # 10.2.1
FetchContent_MakeAvailable(fmt)

target_link_libraries(&lt;your-target&gt; fmt::fmt)</code></pre>
</li>
<li>
<p><strong>Installed</strong>: You can find and use an <a href="#installation">installed</a> version of
  {fmt} in your <code>CMakeLists.txt</code> file as follows:</p>
<pre class="highlight"><code>find_package(fmt)
target_link_libraries(&lt;your-target&gt; fmt::fmt)</code></pre>
</li>
<li>
<p><strong>Embedded</strong>: You can add the {fmt} source tree to your project and include it
  in your <code>CMakeLists.txt</code> file:</p>
<pre class="highlight"><code>add_subdirectory(fmt)
target_link_libraries(&lt;your-target&gt; fmt::fmt)</code></pre>
</li>
</ul>
<h2 id="installation">Installation</h2>
<h3 id="debianubuntu">Debian/Ubuntu</h3>
<p>To install {fmt} on Debian, Ubuntu, or any other Debian-based Linux
distribution, use the following command:</p>
<pre class="highlight"><code>apt install libfmt-dev</code></pre>
<h3 id="homebrew">Homebrew</h3>
<p>Install {fmt} on macOS using <a href="https://brew.sh/">Homebrew</a>:</p>
<pre class="highlight"><code>brew install fmt</code></pre>
<h3 id="conda">Conda</h3>
<p>Install {fmt} on Linux, macOS, and Windows with <a href="https://docs.conda.io/en/latest/">Conda</a>, using its <a href="https://github.com/conda-forge/fmt-feedstock">conda-forge package</a>:</p>
<pre class="highlight"><code>conda install -c conda-forge fmt</code></pre>
<h3 id="vcpkg">vcpkg</h3>
<p>Download and install {fmt} using the vcpkg package manager:</p>
<pre class="highlight"><code>git clone https://github.com/Microsoft/vcpkg.git
cd vcpkg
./bootstrap-vcpkg.sh
./vcpkg integrate install
./vcpkg install fmt</code></pre>
<!-- The fmt package in vcpkg is kept up to date by Microsoft team members and
community contributors. If the version is out of date, please [create an
issue or pull request](https://github.com/Microsoft/vcpkg) on the vcpkg
repository. -->

<h2 id="building-from-source">Building from Source</h2>
<p>CMake works by generating native makefiles or project files that can be
used in the compiler environment of your choice. The typical workflow
starts with:</p>
<pre class="highlight"><code>mkdir build  # Create a directory to hold the build output.
cd build
cmake ..     # Generate native build scripts.</code></pre>
<p>run in the <code>fmt</code> repository.</p>
<p>If you are on a Unix-like system, you should now see a Makefile in the
current directory. Now you can build the library by running <code>make</code>.</p>
<p>Once the library has been built you can invoke <code>make test</code> to run the tests.</p>
<p>You can control generation of the make <code>test</code> target with the <code>FMT_TEST</code>
CMake option. This can be useful if you include fmt as a subdirectory in
your project but don't want to add fmt's tests to your <code>test</code> target.</p>
<p>To build a shared library set the <code>BUILD_SHARED_LIBS</code> CMake variable to <code>TRUE</code>:</p>
<pre class="highlight"><code>cmake -DBUILD_SHARED_LIBS=TRUE ..</code></pre>
<p>To build a static library with position-independent code (e.g. for
linking it into another shared library such as a Python extension), set the
<code>CMAKE_POSITION_INDEPENDENT_CODE</code> CMake variable to <code>TRUE</code>:</p>
<pre class="highlight"><code>cmake -DCMAKE_POSITION_INDEPENDENT_CODE=TRUE ..</code></pre>
<p>After building the library you can install it on a Unix-like system by
running <code>sudo make install</code>.</p>
<h3 id="building-the-docs">Building the Docs</h3>
<p>To build the documentation you need the following software installed on
your system:</p>
<ul>
<li><a href="https://www.python.org/">Python</a></li>
<li><a href="http://www.stack.nl/~dimitri/doxygen/">Doxygen</a></li>
<li><a href="https://www.mkdocs.org/">MkDocs</a> with <code>mkdocs-material</code>, <code>mkdocstrings</code>,
  <code>pymdown-extensions</code> and <code>mike</code></li>
</ul>
<p>First generate makefiles or project files using CMake as described in
the previous section. Then compile the <code>doc</code> target/project, for example:</p>
<pre class="highlight"><code>make doc</code></pre>
<p>This will generate the HTML documentation in <code>doc/html</code>.</p>
<h2 id="build-systems">Build Systems</h2>
<h3 id="build2">build2</h3>
<p>You can use <a href="https://build2.org">build2</a>, a dependency manager and a build
system, to use {fmt}.</p>
<p>Currently this package is available in these package repositories:</p>
<ul>
<li><a href="https://cppget.org/fmt/">https://cppget.org/fmt/</a> for released and published versions.</li>
<li><a href="https://github.com/build2-packaging/fmt">https://github.com/build2-packaging/fmt</a> for unreleased or custom versions.</li>
</ul>
<p><strong>Usage:</strong></p>
<ul>
<li><code>build2</code> package name: <code>fmt</code></li>
<li>Library target name: <code>lib{fmt}</code></li>
</ul>
<p>To make your <code>build2</code> project depend on <code>fmt</code>:</p>
<ul>
<li>
<p>Add one of the repositories to your configurations, or in your
  <code>repositories.manifest</code>, if not already there:</p>
<pre class="highlight"><code>:
role: prerequisite
location: https://pkg.cppget.org/1/stable</code></pre>
</li>
<li>
<p>Add this package as a dependency to your <code>manifest</code> file (example
  for version 10):</p>
<pre class="highlight"><code>depends: fmt ~10.0.0</code></pre>
</li>
<li>
<p>Import the target and use it as a prerequisite to your own target
  using <code>fmt</code> in the appropriate <code>buildfile</code>:</p>
<pre class="highlight"><code>import fmt = fmt%lib{fmt}
lib{mylib} : cxx{**} ... $fmt</code></pre>
</li>
</ul>
<p>Then build your project as usual with <code>b</code> or <code>bdep update</code>.</p>
<h3 id="meson">Meson</h3>
<p><a href="https://mesonbuild.com/Wrapdb-projects.html">Meson WrapDB</a> includes an <code>fmt</code>
package.</p>
<p><strong>Usage:</strong></p>
<ul>
<li>Install the <code>fmt</code> subproject from the WrapDB by running:<pre class="highlight"><code>meson wrap install fmt</code></pre>
</li>
</ul>
<p>from the root of your project.</p>
<ul>
<li>
<p>In your project's <code>meson.build</code> file, add an entry for the new subproject:</p>
<pre class="highlight"><code>fmt = subproject('fmt')
fmt_dep = fmt.get_variable('fmt_dep')</code></pre>
</li>
<li>
<p>Include the new dependency object to link with fmt:</p>
<pre class="highlight"><code>my_build_target = executable(
  'name', 'src/main.cc', dependencies: [fmt_dep])</code></pre>
</li>
</ul>
<p><strong>Options:</strong></p>
<p>If desired, {fmt} can be built as a static library, or as a header-only library.</p>
<p>For a static build, use the following subproject definition:</p>
<pre class="highlight"><code>fmt = subproject('fmt', default_options: 'default_library=static')
fmt_dep = fmt.get_variable('fmt_dep')</code></pre>
<p>For the header-only version, use:</p>
<pre class="highlight"><code>fmt = subproject('fmt', default_options: ['header-only=true'])
fmt_dep = fmt.get_variable('fmt_header_only_dep')</code></pre>
<h3 id="android-ndk">Android NDK</h3>
<p>{fmt} provides <a href="https://github.com/fmtlib/fmt/blob/master/support/Android.mk">Android.mk file</a> that can be used
to build the library with <a href="https://developer.android.com/tools/sdk/ndk/index.html">Android NDK</a>.</p>
<h3 id="other">Other</h3>
<p>To use the {fmt} library with any other build system, add
<code>include/fmt/base.h</code>, <code>include/fmt/format.h</code>, <code>include/fmt/format-inl.h</code>,
<code>src/format.cc</code> and optionally other headers from a <a href="https://github.com/fmtlib/fmt/releases">release archive</a> or the <a href="https://github.com/fmtlib/fmt">git repository</a> to your project, add <code>include</code> to include
directories and make sure <code>src/format.cc</code> is compiled and linked with your code.</p>












                
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